help with inquisitor to audio game

I am having trouble building the catapult I talk to the guard and he wants me to build it but I don’t know what to do so help would be appreciated

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I even got all of the gears?

I got all of the gears that were by the guards house, I also went to the scarecrow and took him apart. I think I need to go to the blacksmith but every time I try to go there he says he’s not interested in that right now I also got the X in the chisel